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9c40311622
abench (audio benchmark) is an audio benchmarking utility that allows testing decoder performance.
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/NumericLimits.h>
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#include <AK/Types.h>
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#include <LibAudio/Loader.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/ElapsedTimer.h>
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#include <LibCore/File.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <stdio.h>
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// The Kernel has problems with large anonymous buffers, so let's limit sample reads ourselves.
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static constexpr size_t MAX_CHUNK_SIZE = 1 * MiB / 2;
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ErrorOr<int> serenity_main(Main::Arguments args)
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{
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char const* path = nullptr;
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int sample_count = -1;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Benchmark audio loading");
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args_parser.add_positional_argument(path, "Path to audio file", "path");
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args_parser.add_option(sample_count, "How many samples to load at maximum", "sample-count", 's', "samples");
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args_parser.parse(args);
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TRY(Core::System::unveil(Core::File::absolute_path(path), "r"));
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TRY(Core::System::unveil(nullptr, nullptr));
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TRY(Core::System::pledge("stdio recvfd rpath", nullptr));
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auto maybe_loader = Audio::Loader::create(path);
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if (maybe_loader.is_error()) {
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warnln("Failed to load audio file: {}", maybe_loader.error().description);
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return 1;
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}
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auto loader = maybe_loader.release_value();
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Core::ElapsedTimer sample_timer { true };
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u64 total_loader_time = 0;
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int remaining_samples = sample_count > 0 ? sample_count : NumericLimits<int>::max();
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unsigned total_loaded_samples = 0;
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for (;;) {
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if (remaining_samples > 0) {
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sample_timer = sample_timer.start_new();
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auto samples = loader->get_more_samples(min(MAX_CHUNK_SIZE, remaining_samples));
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auto elapsed = static_cast<u64>(sample_timer.elapsed());
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total_loader_time += static_cast<u64>(elapsed);
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if (!samples.is_error()) {
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remaining_samples -= samples.value()->sample_count();
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total_loaded_samples += samples.value()->sample_count();
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if (samples.value()->sample_count() == 0)
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break;
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} else {
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warnln("Error while loading audio: {}", samples.error().description);
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return 1;
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}
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} else
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break;
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}
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auto time_per_sample = static_cast<double>(total_loader_time) / static_cast<double>(total_loaded_samples) * 1000.;
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auto playback_time_per_sample = (1. / static_cast<double>(loader->sample_rate())) * 1000'000.;
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outln("Loaded {:10d} samples in {:06.3f} s, {:9.3f} µs/sample, {:6.1f}% speed (realtime {:9.3f} µs/sample)", total_loaded_samples, static_cast<double>(total_loader_time) / 1000., time_per_sample, playback_time_per_sample / time_per_sample * 100., playback_time_per_sample);
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return 0;
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}
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